Fire-alarm.



W. M. DANA L C. C. PALMER.

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l art to which it appertains to make and use the saine. l

This invention has for its object to provide .an improved fire detectorand alarm especially adapted for use in connection with telephoneSystems; and to such ends, the nvention consists of the novel devicesand combinations of devices hereinafter dei scribed and definedY in theclaims.

in the accompanying drawings kwhich` illustrate the invention, likecharacters indi cate like parte throughout the several views.

Referring tothe drawings,

Figure ,l is a diagrammatic view illustrating thecomplete system; and

lilig. 2 is a detail showing one of the autovrnatic detectors in theform of a thermally actuated circuit closer having a fusible element.

Located in the building in which the de testing alarm system isinstalled, is an electric circuit herein designated as the detectorcircuit 3, in which is a source of electricai energy, suoli' as astorage battery fi. This detector circuit 3 has a closer, to wit anydesired number of 'branch line leads 3a that are normally open, but atnumerous places, are' adapted to. be cross connected by thermallyactuated circuit closers oi' suitable form. "lliesel thermally actuatedcircuit closers may taire various forms, but as shown, are made up ofapproximately vU -sliaped springs e normally connected on one side tcone of the pair of leads 3, but normally out of engagement with contacts5 on the other lead; The prongs of these circuit closers l are normallyconnected -lo solder 6 of low fusibility, that is, of usilnlity thoughtdesiralole to. cause thesame to properly melt before a re has done. muchdamage in the vicinity thereof. When the solder 6 melts, the 'loosenedprong of the contact closer 4L will` snr-ing intoengagemenjt with thecooperating contact 5 and close lthe detector spense er tenere 'recessapplicants. neu naar c, rete, sensi ne. scares.

carentes e,

circuit, thereby. causing certain operations presently to be described.,

Tire several pairs ory branch leads 3 may `loe assumed to extend to,dierent floors ot the building and they are, ot course, er tended tosuch places on ytice several doors and provided with the lire detectine'circuit closers wherever deemed advisab e..4 @t course the closing ofthe circuit through any one of these circuit elo/sers, produced lay anabnormally high temperature induced icy an incipient nre, will causetime closing or the detector circuit,

Lussac preferite .ie es one er ne' building but at any other suitableplace and connected in the detector circuit '3 1s an electromagnetwhich., when energized,- op,

crates on tirey armature end ot .a dro 'latch 8 that is suitably pivotedat' 9. At t e tree en d of its long arm, vthe latch 8 is provided with ahook or detaining; loclr l0 that nor mally iiolds the upper end of asmall inter rnediately pivoted switch actuating lever il;

that is under tension tok move Jfrom a suitably anchored coiled tensionspring i2., Also, located in one lead 'of tice detector cir cuit is apair ot spring contacts i3 that are under spring strain to separate and,when released, open the said detector circuit However, normally, or whenthe lever il is held by the laten d, the lower end of'. 'f

lever presses tire free ends of tire contacts i 13 into engagement .andcloses. detector circuit et that point, The lever il, electromagnetandlatcli described, constitute one Jform of an important dev-:ice fortiarscgfs; tern Wnicii may :be designated as an electrornfnagneticswitch actuaton Located also in the building in which signal system isinstalled, and preferably in the immediate vicinity of tice electronic@netic switch. actuator, issn alarm device preferably in tire torni or anelectnlcally actuated alarm bell it. Located adj scent tothe localalarrnlceli it is a telea phone transmitter i5, The lcell .ifi and acattery i@ are connected in.- a locel elaine.

circuit l?, the leads or which 'are comected to a pair of spring;contacts l that are irrsulated from eacli other and -normaiy fined so ll. u v q the said circurt is .normally open Elie vemitter l5 d abattery. i9 are connected` in. 'one or a pair. or leads' 20 that rarecanine e1-tedc` across the telephone' line EL The Qi@ ccrmiccls imspi'iiigg ccccccis Eli l lclcfl imml cccli clslliclc sind fs lip csmrciccl sc chil; tbs c' cil, 26, ci lxc scid ccm tccts is ncrmclly 'c l'lhc tclcphcnc lin 2l mcy bc cliche usccl motion cmi cmccgcmcmc sind ylic' cssiimcd tc bc, s, privccc lilac counseling clic ccc iclcgiliccc cisys is icscllccl, with thc ccslcmciy cccI ircl ccliccs, auch cs lhsusc'cl rcccivcc 23 cmd call lp 2l, ilicic lacing c swiicii 2li' by whichciihciclic rccsivci' 23cm csll limp 24 ccc llc ccnmccic in ilic liuccircuit.

, The (is ci lhs iw@ @cls ci spring@ ccniccls i8 ccd 22 ci ciiciiicsssclivcly, crc sspcmlcil cui lccciccl quil/s cose ccgcthcr, sc llicl cncmcmbci ci cccii ci scid pair ci ccmlaccis is cdcplcd lc hc cc- .1; by cgp -1 block 26 ci insulating mclcricl ccmcd by lilac ciiclnilclcsinglcvci il ciiy alcsciihcal.

'lhc mumcrcl 2l' indicaccs cn clscii'lc gong crli cssumccl lo loslccclcd im c cccvcnicnls plica cuisidc ci clic building icwliich thcsystem ic insfacllsd, snol ilic numeral 28 iiidi-1 ccics c ccnirclclccti'ic gong which may icc assumed lo lic lccclcd in llic dwelling cihcmc ci the pciscm owning ills building in which lhs cl sys is llc. Tlicbsll 2? vis chown cs ccmncclcd .ccccss clic clcrm circuil l? by lccds29, cmd ilus lcsll 28 -is showin cs ccnme'clsil ccic ihc leads 29 byciccch lccds (l0. A

Willi t cwccgcmcmi, ss is czisclcc:7 wlicc cbc ccctccls i8 crc cicsscdccgciliccg claim ciicaiic 1.7 will hc clcscrl, thcislay ciccic lcccllcsll il cmd clic closing ci? clam 'circuil simu Stcccciisly clcscs illsciiciiil; clicccgh ich@ cuisidlc claim lacll il?,

cccl libc cwiici"s pmvcic claim lzsll 28. Mcmcvci, whim lli-s spiiiigccnlscf'cc @ifcis l iicsssfl mgcchcc ih@ ciiccii lalniciigli llaliclccc' clam lammsmiisci l5 will lcs clcccil sc ilicl. ii' cencccl che@cuis ic lic? i'cccivsio clic ccc licci lah@ claim givc'c by clic lccclclcim lccll il. 'llc cpciciicc ci clic @ce dsicc'lcr cual claim sysismsuciiccl, is sulzslccliclly cs icllccfs:

Vfhcccvci c icc building. in which ilic sy fsm is imslcllccl, ciccl/cscucli cbmcmcl lacci cs ic cicli lilac iusilclcmclci'icl c ci scy cnc cithc ciicuic clcssis 4l, thc ilclccici cir cui?, 3 lic clcscd smi mcgcci7 will lic cuerd. cn mcgcci is cncigizc il "if cpcrcics cn ilic epcmlicgcmcicic smi ci imi lifts the scm@9 lalicrcliy iclcm-` lcvcr 11. cmswiichclcsccsccl, sciicg i@ will ilcicw thc uic i picssci' b cck 26against lhc iicc @is ci fil: cdjcccnl; spring coclccts i8 ccd ilccicbyclcs n, clc circuit l? and its bicccli circuits 29 cmi-3G cmd.ullicmcccsly llcwi clc si licciicr ciithc lcfsc 8 ingswifl'fclmclcsinf: c; lover-ll is n:

cull, 20 cc h lhs mmm Ncimclly c cciiicc @c .is im @mmm @c llic@acciai/c thc buildicg' im which lalic .hcc slcrccfl and, liciicc9 l?cmi 20, ic

' ccilictcif wliciclcm is clccccl thc switch ci salici claim cii'ccilwill cicsiiic ci lili@ lim@ circiiil: ihicugli ccll lcmp QQ .wmp lh@ miclic scuiicl maids by llic lcccl claim lisll il,

wliicli scumi is lclicc up sind irciismiilccl liy thc spccislicciticil5. @amiral will, ci ccuisc, ccdcicicnd lilac clic' cgi-iig cithis licll ci clic csrciculci louilclinggi' plscc Wncrc clic system isinsicliccl, iiiiccics limi c ilzcc will ccll clic ic dcci-lzmcci,directing ilicm' lc ilic plccc ci clic lll; il'xc s cmc limc,I

ilic building or plant, sic bcll 28, will bs Thc ccll lamp 2i is onlyccc ci scvcicl icims ci ccll devicc ilici. mcy los csccl cc ccll' ih@cllcniicn ci ccmicl lac lhs laici that c :lira has stance/d.. A bsll mcybe ucsd cs' am sclcliiicc ic ci substilclic ici ilic scid lamp whenclcsiicd. lt shcul cow wlmi ilic dslccici" circuit 3 is clcscci, csabcvc dcscribcd, cmi magnet cnci'gizcd cmi ccuscfl lc sci ugpcii icl/cli8 lo rclccsc switch clccimgl; lecci' ll, cs cbcvc dcwribcd, ills iiizitiailmcvcmcccscf clic ssicl lcvci: il scivc cc iclccsc ilic cnc springccniccl: i3 iicm clic cilici, ilicrclcy pcrmitiing thc said springccciccis itc hc scpsrciccl and cpcii lili@ clctcccci ciicuil;immccliclssly ciici lilac cii'ccii; closing lcvci lascia misi-ccd. isimpciiccc lcscccss il cuis cui ills balciy 'l immcdiaicly cil/ci ilpcicimccl iis cliicc ci ccciicg'f iciccsc ci liuc cii'ciiil,clcsiiig'lcysi ccd ilis clcsimg ci@ clic clcici acci specialiiciismifcsc circuits. l v

Wlicl, Wc claim is:

l. Al llc@ dcisclic'g and claim sysicm ccmf iii-icing c dclcciiiigciicci; imi/inc' ilicisic ciculiiplicily ci normally @pcc iccimcilyccicciccl circuit clcscis, cc claim cicciiii haw ing am claim dcvics ccdc, fscimcllclccc swiccli, cncl cc clccicmcgcclic sWir/ch wlicc scidclsiccccc circuit by clic .ringing of ilcc cciiiccl that s, ic has bcclcsc 9 scifi detector ciccic lim/ing c ncimclly clcsc'cl switchcirccgccl lac loc cpsiicd by clic switch clcsing mcvcmccc ci scidswiccli cciccicix l mccicrl jtliccciii cccl lccclccl im clcss pisciy lcthc claim cincc ci scicl cli/mc ccfccil9 scc 1 nl lha-,i3 llicclcicclci? cic.

folic cyl/cci" ci mans' cgci ci @felici palsy pccislly iccicscccl m,

lic mclcli that lli icc

icc

meente n nornmliy open switch in ssiiri transmitter circuit connections,seid letter switch oleo being arranged to he ciosed by seid switch.actuator when said detector circuit is closed, Seid detector circuitlnrving n normally closed switch arranged to he opened by the switchciosing movement of sind switch nctuntor.

3. A rire detecting und nlarin'systeui comprising n, detecting circuithaving therein e multiplicity ot normully open thernnrliy actuatedcircuit closers, un alarm circuit heviug therein un ulurln 'device:trici e nornmliy open Switch, an electro-umgnetic switch uctu :ttorwhereby, when Said detcctorcireuit is closed, the switch of seid alarmcircuit Wiii he cioseil, seid detector circuit having n normaliv closedswitch arranged to be openeti by the switch closing movement et seidswitch actuator, n line circuit which, et the contrai stetion' has o,teiephene receiver, e central onli cicvice, and a switch cutting seidreceiver enti cnil device into end out of notion :it wili.,

i, A rc etecting and :derni system cornprising ndetecting circuit hnvingtherein n mnitipiicityor normeiiy open thermeliy uctunteri circuitclosers, en clarin circuit heving therein en eier-in device and nnormally open switch, an eiectro-mngnetic switch e'ctuntor wherehy, whensaid detector circuit is closeti, the switch et seid elerm circuit willhe ciosec't, seid detector circuit having e nornmiiy ciosed switcharranged lto he openeii hy the switch eiosing movement of seici switchnctnetor, e line circuit, which, et the centreistetion has e 'teiephonereceiver, e contrai cnil cievice, and e switch cutting seid receiver endceti device into and out oi.2 action et Wiii.

5. iin n tire detecting end alarm syst-ern, the combination with edetecting circuit including en eiectromegnet enti e multiplicity ornormality opened thermeiiy actuated cir two switches, :i inte-hnorinztiiy hoidin cuit closcrs, or en charm circuit inciu'ding nuelectrically nctunteci gong, n iine circuit, e tciephone transmitterlocnteril closciy ndice cent to seid going anni connected across serlino circuit, uorinully open switches in sani :ilurni und tramsniittcrcircuits, n switch actuetor operative when reieesed to close simi twoswitches, e hitch norniniiy holding seid switch actuator but arranged tobe reieeseci when said eicctronmgnet is, energized by closing ot seiddetector circuit, enti n nornmliy closed circuit eioser in seidVdetector circuit :rrrengeri to loe opened byn the switch closing`movement of sind switch actuator. 6. in e fire detecting end alarmsystem,

the. combination with a detecting circuit in- .cluclingg1 en'eiectromegnct end n muitipiicity closedcircuit cioser in Seid detectorcircuit' arranged to he opened by the switch dosing movement of seidswitch actuator, said line circuit ete centrati station having etelephone receiver, a contrai cnil ldevice, and n switch whereby' seidreceiver and ceii device may he connected in the iinecircuit et wiii.

iin testimony whereof we efir our signetures in presence ci 'triowitnesses.,

WLLAM' .c CHARLES C,

Witnesses z CLARA Demeurer, Bnnicrcn BAUMANNG

